<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		
		<script>
			"use strict"
			
			let set = new Set([1, 2, 3, 4, 2, 5])
			console.log(set)
			
			let map = new Map([["aaa", "username"], [26, "age"]])
			map.set("qq","hh")
			console.log(map)
			
		</script>
	</body>
</html>
